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Method for preparing electronic-grade manganese carbonate from manganese-copper-zinc-cobalt-calcium chloride solution

A technology of zinc-cobalt-calcium and manganese carbonate, which is applied in the field of analytical chemistry, can solve problems such as high equipment requirements, long process, and large acid-base consumption, and achieve the effects of avoiding secondary pollution, uniform particle size distribution, and reducing demand

Inactive Publication Date: 2013-01-23
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

N235 can separate manganese in the chlorination system from metals such as zinc, cobalt and copper, but the phase separation speed is slow, the process is long, and the volatility is large, which seriously affects the production efficiency and is not economical.
The production of manganese sulfate monohydrate required by feed-grade manganese sulfate can be obtained by pressurized crystallization method, but in fact, it is difficult to obtain high-pressure steam, and high-pressure production also requires high equipment
Sodium carbonate precipitation-sulfuric acid dissolution-copper extraction-impurity removal process is relatively simple, but it needs to consume a lot of acid and alkali, the resulting sulfate has low solubility and is easy to crystallize, often blocking pipelines and equipment
However, the manganese dioxide produced by the electrolysis method cannot meet the battery-grade requirements when the impurity concentration is high. In addition, the electrolysis method needs to establish a complete set of electrolysis system, which requires a large investment. This method is generally not considered.
Patent No. 00113535.X discloses a manufacturing method of high-purity manganese carbonate. The raw material only contains a small amount of calcium and magnesium ions, and fluoride is directly added to precipitate and remove it. However, due to calcium fluoride and magnesium fluoride The fine particles of the precipitate make it extremely difficult to completely remove the precipitate, which is not conducive to large-scale impurity removal, and the obtained manganese carbonate cannot meet the electronic grade standard

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Using the P204 impurity removal liquid produced in the cobalt production system of Lanzhou Jinchuan New Material Technology Co., Ltd., that is, manganese chloride, copper, zinc, cobalt, and calcium solution, as raw material, the raw material solution contains 128 g / L of manganese, 36 g / L of copper, Cobalt 2 g / L, calcium 10 g / L, zinc 8 g / L, take 200 mL of raw material solution, and obtain electronic grade manganese carbonate through the following steps:

[0026] 1. Add 14.2 g of solid sodium sulfate to 200 mL of the raw material solution, and white calcium sulfate precipitates out. After stirring for 30 min, it fully precipitates, and the precipitate is removed by filtration.

[0027] 2. Add saturated sodium carbonate (containing 11.9 g of sodium carbonate) solution to the filtrate obtained in step 1 to precipitate a large amount of copper in the form of basic copper carbonate. Measure the pH of the solution to be 2-3. At this time, add 2 g of sodium acetate to control t...

Embodiment 2

[0031] Using the P204 impurity removal liquid produced in the cobalt production system of Lanzhou Jinchuan New Material Technology Co., Ltd., that is, manganese chloride, copper, zinc, cobalt and calcium solution, as the No. 2 raw material, the raw material 2 solution contains 173 g / L manganese and 47 g copper / L, cobalt 5 g / L, calcium 17g / L, zinc 12 g / L, get 200 mL raw material solution, make electronic grade manganese carbonate by the following steps:

[0032] 1. Add 14.2 g of solid sodium sulfate to 200 mL of the raw material solution, and white calcium sulfate precipitates out. After stirring for 30 minutes, it fully precipitates, and the precipitate is removed by filtration.

[0033] 2. Add saturated sodium carbonate (containing 15.6 g of sodium carbonate) solution to the filtrate obtained in step 1 to precipitate a large amount of copper in the form of basic copper carbonate. Measure the pH of the solution to be 2-3. At this time, add 2 g of sodium acetate to control the...

Embodiment 3

[0037] Using the P204 impurity removal liquid produced by Lanzhou Jinchuan New Material Technology Co., Ltd. in the cobalt production system, that is, manganese chloride, copper, zinc, cobalt and calcium solution, as the No. 3 raw material, the raw material 3 solution contains 132 g / L of manganese and 25 g of copper / L, cobalt 3.7 g / L, calcium 10 g / L, zinc 7.5 g / L, get 200 mL of raw material solution, and make electronic grade manganese carbonate by the following steps:

[0038] 1. Add 14.2 g of solid sodium sulfate to 200 mL of the raw material solution, and white calcium sulfate precipitates out. After stirring for 30 min, it fully precipitates, and the precipitate is removed by filtration.

[0039] 2. Add saturated sodium carbonate (containing 8.3 g of sodium carbonate) solution to the filtrate obtained in step 1 to precipitate a large amount of copper in the form of basic copper carbonate. Measure the pH of the solution to be 2-3. At this time, add 2 g of sodium acetate to...

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PUM

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Abstract

The invention discloses a method for preparing electronic-grade manganese carbonate from a manganese-copper-zinc-cobalt-calcium chloride solution. A P204 impurity removal solution generated by a cobalt production system, which is used as the raw material, is sequentially subjected to calcium removal, copper-zinc-cobalt enrichment and manganese carbonate precipitation to obtain the electronic-grade manganese carbonate. The method comprises the following steps: 1. removing calcium; 2. enriching copper, zinc and cobalt; and 3. precipitating manganese carbonate. The manganese carbonate obtained by the method disclosed by the invention has the advantages of uniform particle size distribution, regular appearance and high purity; and the dried incarnadine crystalline finished product satisfies the electronic-grade standard.

Description

technical field [0001] The invention relates to a preparation method of electronic grade manganese carbonate, which belongs to the field of analytical chemistry. Background technique [0002] At present, in the cobalt production system P204 impurity removal liquid, in addition to a small amount of cobalt, it is also rich in valuable metal elements such as copper, manganese, zinc, calcium, etc., forming a solution of manganese chloride, copper, zinc, cobalt, and calcium. The amount of value lost each year is significant in both metal and metal salt prices. The current process routes for recovering manganese mainly include N235 extraction, pressurized crystallization to produce manganese sulfate, sodium carbonate precipitation-sulfuric acid dissolution-copper extraction-impurity removal, electrolytic impurity removal, etc. N235 can separate manganese in the chlorination system from metals such as zinc, cobalt and copper, but the phase separation speed is slow, the process is ...

Claims

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Application Information

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IPC IPC(8): C01G45/00
Inventor 杨瑛刘姝菂王瑞远
Owner LANZHOU UNIVERSITY
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